Stepped back rest cushion



FIG. 1 is a front perspective view of a stepped back rest cushionshowing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left elevational view; the right elevational view is amirror image thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The ornamental design for a stepped back rest cushion, as shown anddescribed.